Hair iron



FIG. 1 is a perspective view of the top, one side and one end of a hair iron showing my new design;

FIG. 2 is a perspective view of the top, opposite side and said one end thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an end elevational view of an opposite end thereof;

FIG. 6 is an end elevational view of said one end thereof; and,

FIG. 7 is an elevational view of said one side, the opposite side being a mirror image thereof.

The broken lines are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a hair iron, as shown and described. 